Hi Shahzad,
Hope you are well.
There are two ways to achieve this functionality.
1) You can understand the Simple Job Board code structure and make customization according to you. We suggest you take the help of a WP expert.
2) We also have an add-on named “How To Apply” that gives you the option to add instructions rather than an application form. Please visit the plugin page and review our premium add-on listing. For personalized support, you can contact us at [email protected].
Link: https://projectdmc.org/plugins/simple-job-board/
Feel free to contact us for any further assistance.
Regards